Correlation between Urban Morphology and Wind Environment in Digital City using GIS and CFD Simulations

Yin, Jie; Zhan, Qiwen; Xiao, Yinghui; Wang, Tao; Che, Erzhuo; Fanshuo, Meng; Qian, Yi

doi:10.3991/ijoe.v10i3.3631

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…They designed a greenhouse integrated system that yield the required amount of energy using solar absorber tubes. These tubes are placed in a sealed area under the ceiling of the greenhouse [19,20]. But there is an insufficient number of studies in the field of stability and reliability of nozzles.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Effect of Nozzle in High Pressure Humidification Systems of Water Evaporator

Savchenko

Minenko²,

Kulykivskiy³

et al. 2021

Int. J. Onl. Eng.

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<p class="0abstract">This paper describes the comparative analysis of nozzles efficiency in high pressure water vapor systems based on different operating time and quality of their work. These nozzles described the size of water droplet and convert it into moisture. Which help to manage the room temperature. Literature survey revealed an insufficient number of studies in the field of stability and reliability of nozzles.As, it is the strong candidate in performance of the humidifiers.The purpose of this work is to test and complement the results of the received theoretical provisions, the establishment of values of the rational time of operation of the nozzles. The action plan includes laboratory and industrial tests. The main parameters focused here, were the contamination of the nozzle filters at their different operating times, the performance of the nozzles with variable operating time, as well as the nozzle spray torch, and most importantly the quality of the injector.The cone shaped nozzle was used to test the effectiveness of the spray by assuming that the water torch is coming from the nozzle. Weight method was used to estimate the degree of contamination in filters. In this study, it was found that nozzle filters increase their weight by more than 45% when operating for more than 1,500 hours, which reduces their throughput and, as a result, reduces the performance of the injectors by more than 20%. In this case, the spray torch does not cover the required area, which leads to deterioration of the system and the appearance of micro-drafts. Experimental studies have shown the need for maintenance of injectors within 1200-1300 hours of operation. Moreover, the increase in contamination of the filter effects the performance of the filter. And the stability of the diameter of the torque torch explained by critical clamping of the nozzle filter.<strong></strong></p>

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Effect of Nozzle in High Pressure Humidification Systems of Water Evaporator

Savchenko

Minenko²,

Kulykivskiy³

et al. 2021

Int. J. Onl. Eng.

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“…이 CFD 모델은 기존의 기상 모델이 반영할 수 없었던 지형과 건물을 지 면 경계 자료로 사용하고 수십 m 이하의 해상도 사용이 가능하며, 바람, 기온, 습도 등 주요 기상 요소에 대한 수 치 해석이 가능하기 때문에, 도시 지역의 대기 흐름과 오염 물질 확산에 관한 연구에서 많이 사용된다 (Lee et al, 2009;Lee and Kim, 2011;Kim et al, 2012;Kwak and Baik, 2012;Kwak and Baik, 2014;Kwak et al, 2015). CFD 모델에 필 요한 지면 경계 자료 구축을 위하여 대부분의 연구에서 는 상세한 지형과 건물 정보를 격자형식으로 제공하는 지리정보시스템(geographic information system, GIS) 자 료를 사용한다 (Chu et al, 2005;Lee et al, 2009;Lee and Kim, 2011;Jie et al, 2014;. -6 8 - (Fig.…”

Section: 서 론unclassified

Analysis on the Observation Environment of Surface Wind Using GIS data

Kwon

Kim

2015

Korean Journal of Remote Sensing

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:In this study, the observation environment of surface wind at an automatic weather station (AWS 288) located at Naei-dong, Mirang-si was analyzed using a computational fluid dynamics (CFD) model and geographic information system (GIS). The 16 cases with different inflow directions were considered before and after construction of an apartment complex around the AWS 288. For three inflow directions (south-south-westerly, south-south-easterly, and north-north-westerly), flow characteristics around the AWS 288 were investigated in detail, focusing on the changes in wind speed and direction at the AWS location. There was marked difference in wind speed between before and after construction of the apartment complex in the south-south-westerly case. In the south-south-easterly and north-northwesterly cases which were frequently observed at the AWS 288, the construction of the apartment complex had no marked influence on the observation of surface wind.

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“…(Lee et al, 2009;Neophytou et al, 2011;Rakowska et al, 2014). 모델링 기법이 있다 (Lee and Kim, 2011;Jie et al, 2014;Kwon and Kim, 2015;Yang and Kim, 2015). 이 기법은 (Kim and Baik, 2004;Kim, 2007;Kim Korean Journal of Remote Sensing, Vol.32, No.2, 2016 and Baik, 2010; Kim et al, 2014).…”

Section: 서 론mentioning

confidence: 99%

Effect of Artificial Changes in Geographical Features on Local Wind

Kim¹,

Kim²

2016

Korean Journal of Remote Sensing

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:The effect of artificial changes in geographical features on local wind was analyzed at the construction site of bridge and fill-up bank in the southern part of Haui-do. Geographic Information System (GIS) data and Computational Fluid Dynamics (CFD) model were used in this study. Three-dimensional numerical topography based on the GIS data for the target area was constructed for the surface boundary input data of the CFD model. The wind observations at an Automatic Weather Station (AWS) located in Haui-do were used to set-up the model inflows. The seasonal simulations were conducted. The differences in surface wind speed between after and before artificial changes in geographical features were analyzed. The surface wind speed decreases 5 to 20% at the south-western part and below 2% of the spatial average for salt field. There was also marked the effect of artificial changes in geographical features on local wind in the westerly wind case for the target area.

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Correlation between Urban Morphology and Wind Environment in Digital City using GIS and CFD Simulations

Cited by 3 publications

References 11 publications

Effect of Nozzle in High Pressure Humidification Systems of Water Evaporator

Effect of Nozzle in High Pressure Humidification Systems of Water Evaporator

Analysis on the Observation Environment of Surface Wind Using GIS data

Effect of Artificial Changes in Geographical Features on Local Wind

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